Air diffuser



FIG. 1 is a perspecitve view of the air diffuser embodying the subject industrial design taken from above;

FIG. 2 is a perspective view taken from below;

FIG. 3 is a side elevation taken from the side opposite the inlet;

FIG. 4 is a side elevation taken from the inlet side;

FIG. 5 is a bottom plan view;

FIG. 6 is a side elevation taken at 90° from FIG. 4, the opposite side being a miror image thereof; and,

FIG. 7 is a top plan view. 

The ornamental design for an air diffuser, as shown and described. 